function RouteSubscriber::addRedirectRoute

Adds a redirect route.

Parameters

string $route_name: The name of a route whose path has changed.

File

core/modules/block_content/src/Routing/RouteSubscriber.php, line 124

Class

RouteSubscriber

Subscriber for Block content BC routes.

Namespace

Code

protected function addRedirectRoute(string $route_name) : void {
    // Exit early if the BC route is already there.
    if (!empty($this->collection
        ->get("{$route_name}.bc"))) {
        return;
    }
    $route = $this->collection
        ->get($route_name);
    if (empty($route)) {
        return;
    }
    $new_path = $route->getPath();
    if (!str_starts_with($new_path, $this->basePath)) {
        return;
    }
    $bc_route = clone $route;
    // Set the path to what it was in earlier versions of Drupal.
    $bc_route->setPath($this->basePathBc . substr($new_path, strlen($this->basePath)));
    if ($bc_route->getPath() === $route->getPath()) {
        return;
    }
    // Replace the handler with the stored redirect controller.
    $defaults = array_diff_key($route->getDefaults(), array_flip([
        '_entity_form',
        '_entity_list',
        '_entity_view',
        '_form',
    ]));
    $defaults['_controller'] = $this->controller;
    $bc_route->setDefaults($defaults);
    $this->collection
        ->add("{$route_name}.bc", $bc_route);
}